Rolling machine for fibrous mattresses
CA 2254085 A1 · Owner: Isover Saint-Gobain · Inventors: Kaufmann, Friedrich; Louis, Bernard; Siegel, Werner
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a rolling machine for compressing and rolling a fibrous mattress (1) into itself. Said machine is of the type comprising two belts each of which envelops approximately half of the circumference of the forming roll. The rolling machine further comprises a plate (13) to maintain the mattress (1) in its compressed form. Said plate (13) and possibly the device (11) which compresses the mattress is mobile, and moves downwards as the fibrous mattress roll is formed. In a variation of the invention the device (11) which compresses the mattress is stationary and the plate (13) lengthens.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed March 2, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 2, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 2, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.